commit aa67706345b09a210b2db7d2f46627c80943856e
author Michal Vasko <mvasko@cesnet.cz> Tue Mar 09 13:52:53 2021 +0100
committer Michal Vasko <mvasko@cesnet.cz> Tue Mar 09 13:52:53 2021 +0100
tree 3138b6aa70aa2bcc9a7529c0fba547ac8968acf1
parent 9a7e9d0a069f61abc43f05e2bfa9b89e26e2fbb7

xpath BUGFIX casting empty set to string

src/xpath.c

diff --git a/src/xpath.c b/src/xpath.c
index 9fe638f..bbd75f1 100644
--- a/src/xpath.c
+++ b/src/xpath.c
@@ -502,6 +502,14 @@
 static LY_ERR
 cast_node_set_to_string(struct lyxp_set *set, char **str)
 {
+    if (!set->used) {
+        *str = strdup("");
+        if (!*str) {
+            LOGMEM_RET(set->ctx);
+        }
+        return LY_SUCCESS;
+    }
+
     switch (set->val.nodes[0].type) {
     case LYXP_NODE_NONE:
         /* invalid */
@@ -8643,8 +8651,6 @@
             LY_CHECK_ERR_RET(!set->val.str, LOGMEM(set->ctx), LY_EMEM);
             break;
         case LYXP_SET_NODE_SET:
-            assert(set->used);
-
             /* we need the set sorted, it affects the result */
             assert(!set_sort(set));